This achievement is for completing The Olympian chapter of the main storyline during Episode 7.
There are three Chapters you have to complete first:The Reunion
Home Is Where My Mother Is
Then you can do:The Olympian
Delivering a Champion
The Long Game
Solution sourced from HolyHalfDead: https://www.trueachievements.com/a261171/going-for-gold-achi...